Expansion-valve for refrigerating systems.



G. W. SPELLMEYER. EXPANSION VALVE FOR REFRIGERATING SYSTEMS.

APPLICATION FILED AUG. 26, 1907.

1,002,463, Patented Sept. 5,1911.

2 r I 2 SHEETS-SHEET l.

To all whom concern: Be it known that I',1.C HARrLEs W. SPELL- UNITED STATES EXPANSION-VALVE non imrnrenna'rine SYSTEMS.

Specification ofll Letters Patent.

Application filed'A'tigust2i6, 1907. Serial No. 390,262.

Mnv'nm'a citizen of the United States, andf resident of St. Louis, Missouri, have invent; ed certain'new za'ndxuseful Improvements inS Expansion-Valves for Refrigerating'Sys tems,'of' which-the following is a specifica tron conta'inln'g a full, clear, and exact de i scr'iption, refei'en'ce being had to'the accom- 'p'anying drawings, forming a part hereof.

, My invention relates to an expansion valve 1 for refrigerating systems, and the object of; my invention is toprovide simple and in expensive means whereby the expansion valve in a, refrigerating system may be} temporarily cut-.out of service by means of i'Wd'i Sc'on'd'ary jvalves".located in thesame valve-body adjacent the expansion valve, in

order that said expansion valve maybe removed for the 'pu'rpose'of repair, or to per-i .mltf new packing to be placed on-top of said ex ansion valve.

the'expansion valvesrequ re' repair or attention but,.by my improved construction, the t1me"requir'ed"for this pumping out is enwith, anda :simple,'comfrom accumulating on the stem and; thus tirely done away pact construction is provided;

To the above purposes,.my. invention con- 1 sists in certain novel features of construc tion and arrangement of parts, which will be hereinafter more fully set forth, pointed out in the claim, and illustrated inthe .accoma panying drawings, in which Figure 1' is-a Vertical section taken through the center of an expansion valve of my .improved construction; Fig. 2 is a horizontal section taken onjthe line 22 of Fig. 1; Fig. 3 "is a detail section showing a modified form of the valve and valve seat; Fig. 4 is a vertical section taken through the center of a or housing, in the upper portion of the right modified form ofthe valve; Fig. 5 is a horizontal section taken on the line 5 -5 of Fig. 4:. I

Referring by numerals to the accompanying drawings :-1 designates the valve body hand side of which is formed a chamber 2; and formedin the lower portion of the housing, below this chamber 2, is a chamber 3,

there being a passageway or port 4 connecting said chambers 2 and 3; and leading from the chamber 3 downward to the inlet pipe 5: is a passageway; or port, 6. q

Formed in the upper left hand portion of the housing 1 is a chamber 7, communicating with the chamber 2 by means of. apassageway or'port 8, and leading from said passageway 7'to an outlet pipe '9, tapped or fianged into the housing 1,.is a passageway or' port 10.

Horizontally disposed. in the bottom of the chamber 2 is a soft or hard metal ring 11', which forms a seat for the tapered lower f end '12 of the valve 13, which is' exteriorly screwthreaded 'andadaptedto operate in the upper port-ion of the chamber 2, 'said valve being provided'with a vertically dis posed stem 14', which passes through a gland orstufli'ng box 15., an'd'b'eing provided on its upper endwith a handle 16. i

" Vertically disposed at'the inner 'end of the chamber '3 is a soft or hard metal ring 17,

which forms a seat for the tapered innerend- 118 of'a' valve 19, which is'threaded for o'perati'on rinthejchamber 3, said valve being pro- {Vide d with a stem 20 which passes through ,ei'eto'fore it has been necessary to shut down. and; puiuip .out' the entire-system when as'tufling box 21 arranged on the side of the housing 1, and the outer-end of said stem being square, as .designated by 22.

- Removably positioned onthe exposed end the purpose ofj; preventing rust and dirt renderingth's me useless- I y Seated "in the lower end of this stem 20-;is a sleeve'23,gwhich is for" of the chamber 7 s s h dme l ri g awa h arm a seat -fortli e tapered'lower end 25 of the 90 Patented Sept. 5,1911.

in through a stufling box 28 011 the upper 'le -ha nd cornerof'thehousing 1 and the upper end of said stem is square, as designated by 29; and adapted to receive a wheel or handle 30, which latter "is also used on the square end of the stem of the valve 19. In'Fig, 3 I have shown a-hard metal ring In the modification seen'in secondary valves 19 and 26 are both vartically disposed adjacent the ends of the fvalve housing 1,. and the specific expansion valve 13 is done away with, and injits place is provided a conical head which answers thepurposeof an expanslon cock, and which is provided with a transverseaperture 35 adapted to register with the-passageway 31 provided' onitstop surface with an inbetween the secondary valves, and which conical head is held in proper position by an expansive coil spring 36 located inthe chamber below said head. When an expansion valve of my improved constructlon 1s 1n use, the secondary valves 19 and 26 are normally in open positions,

the same can now be removed to be repaired, .or repacked, without necessitating the pumping out or shutting down of any part of the system. Or, in case any pipe sediment, or other foreign substance becomes lodged in the ports 4, the expansion valve may be also removed, thereby permitting the port to be examined, and such substances removed or blown out.

Here'tofore in refrigerating systems when it became necessary to takeout the expansion valve to repair or repack the same, or -replace wlth another valve, a1r would rush into the system on the low pressure side,

which necessitated the pumping out of the system, in addition to repairing or replacing the valve. These secondary valves 19 and 26 may be closed whenever repairs are being made in the line of the suction side of the valve, thus cutting off any leakage which might occur to and through the expansion Valve.

My improved valve may also be placed where other valves are now in use, without the expense of removing any piping.

An expansion valve of my improved construction is simple, compact, easily manipulated, and much time, labor, and consequent expense is saved when it becomes necessary to repair, examine, or repack said valve.

I claim:

The im roved expansion-valve for ammonia re igeratingsystems; comprising the combination with the supply and outlet pipes of such system; of a single valve-body having three valve-seats therein, one of said valve-seats being located in said body adjacent the inlet thereof, another one of said valve-seats being located in said body adjacent the outlet thereof, and a third valveseat being located in said body intermediate of the two valve-seats above mentioned; said body having a single continuous tortuous passageway extending therethrough from end to end, a portion of said passageway at each seat leading downwardly therefrom; said valve seats being separated from and independent of each other; a separate and independent valve for each of said three valve-seats; a se arate stem for independent-1y controlhng each of said three valves; and separate and independent stuifing-glands and packing for each of the three valve-stems.

In testimony whereof, I have signed my name to this specification, in presence of two subscribing witnesses.

CHARLES W. SPELLMEYER.

Witnesses:

EDWARD E. LONGAN, E. L. WALLACE. 

